How current are the data sheets behind the comparisons?
Every figure on GlossAtlas comes from a manufacturer data sheet, and a data sheet has a revision date. Two questions follow: how old are the sheets behind the comparisons, and when a sheet was revised, did the number change? This page answers both from the dataset's own records, and reports what re-checking found.
How old is each brand's documentation?
Age is the time between a sheet's printed revision date and 2026-10-10, the date the whole dataset was last checked against the manufacturers' documents (a fixed date, so these figures do not drift with the calendar). Ages are rounded to a tenth of a year.
| Brand | Sheets | Oldest revision | Newest revision | Median age (years) | Older than three years |
|---|---|---|---|---|---|
| Sherwin-Williams | 8 | 2023-11-01 | 2026-08-01 | 1.2 | 0 of 8 |
| Benjamin Moore | 9 | 2025-03-12 | 2025-06-20 | 1.5 | 0 of 9 |
| Behr | 8 | 2020-05-01 | 2025-06-01 | 2.4 | 1 of 8 |
| Valspar | 8 | 2023-05-15 | 2023-05-15 | 3.4 | 8 of 8 |
Valspar's documentation is the oldest in the dataset (median 3.4 years, 8 of 8 sheets over three years old); the single oldest sheet is Behr Premium Plus, dated 2020-05-01. Sherwin-Williams's is the newest (median 1.2 years). An old revision date is not proof a sheet is out of date: a manufacturer may simply not have revised it. But it is the reason those figures deserve the most careful re-checking.
When a sheet was revised, did the number change?
Five records carry a note that a newer (or older) revision of the sheet exists. These are the only cases the dataset documents, so they are a small sample, but they are real ones.
| Finish | Earlier revision | Current revision | Did the figure change? |
|---|---|---|---|
| Sherwin-Williams Emerald Flat | 11/2023 (101.08FLB) | 12/2025 | No: same range |
| Sherwin-Williams Emerald Matte | 11/2023 (101.08MAA) | 08/2026 (101.08MAB) | Yes: was 0–5 at 85° only; now 0–5 at 60° and 4–8 at 85° |
| Sherwin-Williams Emerald Satin | 11/2023 (101.08SAB) | 04/2026 | No: same range |
| Sherwin-Williams Duration Home Flat | 4/2024 (101.78A) | 11/2025 | No: same range |
| Behr Premium Plus Semi-Gloss | 10/2019 | 06/2025 | Yes: was 35–50 at 60°; now 45–55 at 60° |
| Behr Marquee Matte | 5/2021 (Home Depot-hosted copy) | 5/2024 | No: same range |
| Behr Marquee Eggshell | 2/2023 (Home Depot-hosted copy) | 6/2024 | No: same range |
| Behr Marquee Satin | 2/2023 (Home Depot-hosted copy) | 10/2023 | No: same range |
| Behr Marquee Semi-Gloss | 4/2021 (Home Depot-hosted copy) | 6/2024 | No: same range |
| Behr Premium Plus Flat | 5/2020 | 5/2025 | Yes: was 0–4 at 60° and 85°; now 0–5 at 60° and 85° |
The 3 changes are not cosmetic. Sherwin-Williams Emerald Matte did not just move: the new sheet adds a 60° figure and a different 85° range, so it went from comparable at 85° only to comparable at both angles. Behr Premium Plus Semi-Gloss moved up by ten units at the lower end. Behr Premium Plus Flat's upper bound rose from 4 to 5 at both angles. A match that relied on the older figures would have been slightly wrong. In the other 7 cases the sheet was reissued with the same range, so re-checking them changed nothing but the citation. Sheet revisions are a poor predictor of a figure changing, and a good reason to check anyway.
What re-checking the original records found
The original 16 records were compared with the manufacturers' live documents on 2026-09-21. The result, from the public change log: 13 were unchanged on re-check, 2 had a newer sheet with the same range, and 1 had been transcribed from an older sheet and was corrected (Emerald Matte, above). That is a correction rate of roughly one in sixteen for records that had been checked once already, which is the practical argument for treating the figures as "as of the check date" and for dating every page.
A second re-check, on 2026-10-10, re-read six Behr sheets (Marquee Matte, Eggshell, Satin and Semi-Gloss; Premium Plus Flat and Satin) from Behr's own document host, replacing copies hosted by a retailer. One of the six had a different range (Premium Plus Flat, above); five had the same range. The Marquee sheets turned out to be newer revisions than the retailer-hosted copies.
What GlossAtlas does with that
- Every record shows its sheet's revision date and the date it was last checked, and every page that uses it links the sheet.
- A correction is entered in the change log with its date, never silently overwritten.
- Checks are done by hand against the manufacturers' documents, without a fixed schedule or guaranteed interval (methodology).
- If a source cannot be reached or has changed, the record is marked and the pages that use it say so.
Reading limits
- A revision date is the manufacturer's, not ours. It shows when the sheet was last revised, not how long the formula has been unchanged.
- The revision sample is small. 10 documented cases cannot support a rate for the industry, and 30% is a count here, not a forecast.
- Not every record has an earlier revision to compare. The figures were checked against the current sheet; where no earlier revision was seen, nothing is claimed about one.